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5 Nov 2009 01:04:12 IST

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Q a disc is given an initial angular velocity w and placed on rough horizontal surface ,quantities w

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Q a disc is given an initial angular velocity w and placed on rough horizontal surface ,quantities which donot depend on coeff. of friction: (a) time until rolling begins (b) displacement of C.M. of disc until rolling begins (c) velocity when rolling begins (d) work done by friction

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VARUN RAJ

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Joined: 16 Mar 2008

Posts: 1825

5 Nov 2009 10:05:56 IST

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i think the answer should be c as we can conserve angular momentum abt the bottom most pnt so mvr=mvr+iw here vand w can be found out easily

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